Steam-circulating fitting



' 1,628,382 J. o. WOODSOME sfifimcmoumwme FITTING Y .Fil ed Jan. 16. 1925 2 Sheets-Sheet 1 Ev EEICIFK John Osbogrne Woodsome May 10,1927;

. 1,628,382 J. O. WOODSOME STEAM CIRCULATIIiG FITTING 2 Sheds-Sheet 2 Filed Jan, 16, 1925 @IMM ' John 05 boume Woodsoine Patented May 10, 1927.

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STEAM GIRUL ATING FPBTINGS H In paper making ,ma'chin'es, the 'dryi nw; cylinders are supplied 'ivithheatingisteamat low pressure from any "desired source since 11 the pressure of heatingf steam." commonly used does not-have to be veryfgrjeafl The, heating, steam has to be admitted into "the interior of the. drying 5 cylinders and 'the water of condensation must be extracted 1 from the heatingcylinders.'-

This invention relates "to an improved Venturi type circulating jfittingganda con-j densate remover for: use in connection with paper making machinedrying] cylinders" whereby a satisfactory removal of air, f'non-j condensable gasesand condensed ste'am from; the drying cylinders :is accomplished by means of a suction or vacuum produced in. the improved circulating fitting which iscon nected to admit-'heating steam into the'fdry'F ing cylinders.

It is an object of this invention to pro= vide. an improved steam circulatingfitting ofsimplified construction adapted to be con' neetedein the piping system" of 1a. paper making machine drying cylinder for the'pun pose-*of eificientlydrawingoff the-water of condensation, air. and non-conde'nsable', gases, thereby increasing ithe working -capacity ofthe'dryingcylinder. y

It is also an object of this invention tol provide means within the steam"supplylleads of'the paper making ,machine drying 'eylinders adapted. to, cause a suction in the cyl-f inder exhaust pipes whereby the, condensate 4 may be Withdrawn from the, edrying 'cylinder and returned to the main steamsupply lpipem It is a further object of thisinventionto 7 provide a steam circulating fitting adapted to be' connected in the steam inlet pipe of a paper making -,=mach-ine drying lcylinder, said fitting ibeing; constructed "with. a re-f strieted steam passage which communicates with a larger expansion passageto CIBEIIQB': suction in, the fitting, whereby, the, 'condensate, air and gases, are withdr'awnfromthes dryingacylinders through-outlet pipesiconnected withwthe fittingat thepoint of the: restricted passage.

It is an important ob ect of this invention to provide an improved. fitting, .o simple: and improved construction. without moving; parts and adaptedfto be used in ste am .circulatingsystems to create a suction wherebysteamy water, air and gasmaybewithdrawn, through an exhaust outlet 4 pipe connected with-the improved-fitting i Application filed January-416, 19-25.. set-m1 no; 2,8631;

Other and further -in 1portant'iobjects' of this invention will be apparent from the dis V closuresin the specification and the 'accompanyingsdrawings.

This invention (ina preferred form) is illustrated inthe' drawings 'and'herein'a'fter more any. described.

On the drawings:

Figurefll illustrates a fragmentary sidefl elevation offa paper making' machinet "drying unit"whe'rein the'drying cylinders have improved steam circulating fittingsem'body; ing the principles ofthis'inventionconnected, in'the'steain'inlet pipes'. 7

Figure 2 is an enlarged eleyation'of the improved steam circulating fitting Figure?) alongi tudina'l section'thereo't taken" on line III"%-I1I' of Figure '2;

lii'g'ure 4 is an'enlarged transverse gsec tion taken onjline IV?IV* bf Figure 3.-

As shown on the drawings p The reference numeral 1 indicates the frame of a dryinggunit of a papermaking, machine, said frame having mounted thereon 99 in," any desired manner, a plurality of paper drying cylinders; 2, eachof which is, pro vi de'd' atione end 'withxa trunnion .3 :con-" structefd to afford both an admission opening tenths heating steam and an iopeningto take care of the exhaust of the condensedsteiamf.

I lVliilie? a plu'rality-jof drying cylinders'have' 1 been illustrated in Figure'il, the piping sys te'mfl for onl'y'fi'one :of said 'cylinders will be described in detail. s The arrangement of the piping "is the same forlall of the; drying; cylinders and is believed to be clearlyill'us-J trated in Figure 1.1 Connectedinthe steam' inlet opening of the trunnion 3," is v a "steam inlet pipe i, the lower endiof Which-is com nected to a globe valve 5. -Threaded into the globe valve -5 is a threaded sleeve 6 forming a part lot the improved fsteam' circulatingg fitting of this invention. The fit'tinggcom -i prises a'collar -7' inone end jof lwhic'h the flanged endfiof the sleeve-6 is engaged also; connected in the collar, i7 is theenlarged end; of a conical section embracing ajplurality of frustum shaped sleeves 8,- 9; 10"and 11, the interiors of which communicate to afford a continuous conical chamber 12, ,the ens larged end of .Whichfleads intothe sleeve 6. The sleeve 11 is externally flanged at 13 and" externally threaded -below: said "fla'ngeat '14,: The sleeve 11 is, provided with a steam inlet opening at 15.", Threade'd ,onto the tlfireaded portionil i-of the s eevse ll 51s a Ve'nturrcastv'? invention.

ing comprising a cylindrical portion 16 and a conical portion 17 the outer end oi which is provided with an internally threaded flange '18. The conical portion 17 has a tapered chamber if), the small end of which is restricted at The restricted opening .10 coi'nniunicates with the opening in the reduced end oi. the sleeve 1.1. Also integrally harmed on the side of the Venturi casting is an internally threaded arm A passage E32 provided in the Venturi casting and connects the openings and .20 with the interior ol the arm 21 (Figure 3). Threaded into the flange 18 is a trustum shaped sleeve 23 the interior of which is provided with a tapered chamber communicating with the chamber 19 in the casting portion 17. Externally threaded on the enlarged arm 23 a collar B l. having the flanged end oi" a sleeve 95 engaged therein.

Connected to the sleeve 25 is a steam pipe 26 the lower end of which is connected at one end of an elbow Q7. Threaded into the other end of the elbow 27 is one end of a con necting pipe 28 the other end of which is engaged in one arm of a :tour way connector or cross 29. A connecting pipe 30 is also connected with the cross 29 and has one end thereof attached to receive steam from a steam supply main or pipe 31. Projecting through the cross 99 is a. drain pipe 32 the upper end of which is connected with a tee Elf). The pipe 32 also projects through the pipe and enters the main pipe 31. A pipe. 34 is connected with one arm of the tee 33 and is provided with a check valve The pipe 3-1 is connected to the lower arm of a condom sate trap 36 which communicates with the arm 21 of the Venturi casting by means of a pipe 37. Also connected with the trap i Fit One end is an exhaust or outlet pi ev :33 ll' g e valve 39 therein. The e):-

hanst pipe 38 is also connected in the condcnsate outlet opening provided in the trunnion 3 of the drying cylinder.

The operation is as follows:

In paper making machines a wet web of paper to be dried is conducted between a plurality oi? the drying cylinders 2 which a re rotated by any suitable means and are sometimes heatcd by steam. Steam is admitted through the steam supply pipe ill and passes upwardly through the pipe 30 and the cross 99 and the pipe 28 through the elbow 27 and the pipe 26 through the lower sleeve 25 of the "i enturi type circulating fitting of this From the sleeve 25 the steam pas es through the tapered chamber of the sleeve 23 and to the chamber 19 and then contii'iues through the restricted opening 2:) upwardly through the opening '15 into the long tapered chamber 12 provided in the series of connecting sleeves 8 to .11 inclusive. The entering steam is thus compressed as it passes through the restricted Vcnturi opening 20 and is permitted to expand as it reaches the enlarged opening 15 and the passage 12. This compression and expansion of the steam acts to produce a substantial. vacuum in the Vcnturi type circulating lit ting thereby causing a suction through the passage leading through the arm 21 and the trap 36. siiiction is thus also produced in the exhaust pipe 38 lcadii'lg from the cytindcr trunnion 3 so that the water of con densalion from the cylinder 2 resulting from the drying ot the paper web is drawn out of the cylinder together with a small quantity oi steam which may be mixed with the water of condensation. The water of condtmsatri on together with any steam mixed therewith is thus readily removed from the cylinder and passes into the trap 36 which is constructed to cause the entrapped steam to be drawn through the passage 22 into the Ventnri circulating fitting due to the suction produced therein. The water of condensation, however, passes from the trap 36 downwar-dly through the pipe Set and the check valve 35. then through the tee 83 and the pipe 32 which extends through the cross 29 and the pipe 30 to permit the water oi condensation to flow back into the steam sup ply pipe 31. l

The same operation takes place in each of the drying cylinders oi the paper making machine drying unit. and atlords means for cfliciently removing the water of condensation from the drying cylinders due to the creation of a suction or vacuum in the Vonturi type circulating fittings connected in the steam inlet pipes leading to the trunnions of the steam caps provided on the various drying cylinders.

I am aware that many changes may be made and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted hereon. otherwise than necessitated by the prior art.

T. claim as my invention:

1. The combination with a paper making machine drying cylinder, of a steam supply pipe. a steam inlet pipe connecting the steam supply pipe with the interior of. the said drying cylinder. and a Venturi type steam circulating fitting connected in. said steam in let pipe.

2. The combination with a paper making machine drying cylinder. of a steam supply pipe. a. steam inlet pipe connecting the steam supply pipe with the trunnion of said cylinder. a Venturi type circulating fitting connected in said steam inlet pipe to produce a. suction or vacuum therein, and a condensate exhaust pipe connected with the cylinder trunnion, with the fitting and with said steam supply pipe.

3. The combination with a paper making machine drying cylinder, and the steam intake trunnion thereof, of a steam supply pipe, a steam inlet pipe connecting said steam supply pipe withthe cylindertrunnion, a Venturi type circulating fitting connected in said inlet pipe and constructed to produce a substantial suction or vacuum therein, a trap connected with said fitting, a condensate exhaust pipe connected with the cylinder trunnion and with the said trap, and piping connections connecting said trap with said steam supply pipe.

4. The combination with a paper making machine drying cylinder, and the steam intake trunnion thereof, of a steam supply pipe, a steam inlet pipe connecting the steam supply pipe with the cylinder trunnion, a Venturi type circulating fitting connected in said steam inlet pipe and having a restricted passage therein to cause the creation of a substantial suction or vacuum in an arm of said fitting, a trap connected with said arm, an exhaust pipe connecting said trap with the cylinder trunnion whereby the water of condensation, air, and non-condensable gases in the cylinder are drawn therefrom into the trap due to the action of said suction or vacuum, and piping connections leading from the trap back to the steam supply pipe to permit the water of condensation to be returned to the steam supply pipe while any steam entering said trap is drawn back into the fittin 5. The combination with apaper making machine drying cylinder and the steam supply pipe therefor, of a condensate return pipe and a steam supply inlet pipe connecting said cylinder with the steam supply pipe, a trap connected in said condensate return pipe, and means connected in the steam inlet pipe communicating with said trap adapted to produce suction or a Vacuum suilicient to draw the Water of condensation from the cylinder into the trap for return to the steam supply pipe.

6. The combination with a steam heated cylinder, of a steam supply pipe, a condensate exhaust pipe connecting said cylinder with said steam supply pipe, and a suction or vacuum producing means in said steam supply pipe and connected with the condensate exhaust pipe to cause the water of condensation from said cylinder to be drawn through the condensate exhaust pipe and returned to the steam supply pipe.

7. The combination with a steam heated drying cylinder and a trunnion thereof, of a steam inlet pipe and a condensate exhaust pipe connected with said trunnion, and a Venturi type circulating fitting connecting said steam inlet pipe and said condensate exhaust pipe adapted to create a substantial suction or vacuum to draw the water of condensation from said cylinder.

8. The combination with a steam heated cylinder and a trunnion thereof, of a steam inlet pipe connected with said trunnion, and a suction and a vacuum producing fitting connected in said steam inlet pipe and comprising a plurality of connected sleeves constructed to afford a restricted passage for steam therein.

9. The combination with a steam heated cylinder and a trunnion thereof, of a steam inlet pipe, of a fitting connected therein comprising a casting having an arm integrally formed thereon, said casting having a restricted opening therein, and a passage connecting said opening with the interior of said arm, sleeves connected with both ends of said casting to afford converging conical passages leading from said casting to afford a means of producing a substantial suction or vacuum in said arm when steam passes through the restricted opening, and

through the converging passages.

10. The combination with a steam heated dryer and steam supply pipe therefor, of means for removing condensed steam, entrapped air and non-condensable gases from said dryer comprising a steam inlet pipe connecting said supply pipe and dryer, a Venturi type fitting connected in said inlet pipe, a condensate exhaust pipe leading from said dryer and connected to the constricted portion of said fitting whereby suction is created in said exhaust pipe and a separator in said exhaust pipe' whereby the air and non-condensable gases free from condensate are allowed to be drawn back into said fitting.

In testimony whereof I have hereunto subscribed my name.

JOHN OSBOURNE WOODSOME. 

